<!DOCTYPE html>
<html lang="zh-cmn">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        body{
            margin: 0;
            padding: 30px;
            background-color: #000;
        }
    </style>
</head>
<body>
<svg width="400" height="300" id="water-chart" viewBox="0 0 400 300" preserveAspectRatio="xMinYMin" ></svg>
</body>
</html>